Detectives seeking to determine [Patrick Edward Purdy]'s motive were left Wednesday to pick through his bizarre personal effects and down-and-out past: a collection of toy soldiers arrayed in mock battle throughout Purdy's motel room, symbols scribbled on camouflaged cloth, slogans printed on clothes and weapons, and a drifter's resume of briefly held jobs and obsolete addresses.

Jim Mickelsen, a 21-year-old welder who came to know Purdy last year when the men worked together for a month, had heard Purdy complain about the high percentage of Southeast Asian refugees in industrial arts courses he was taking at San Joaquin Delta College here.

The friend said Purdy used his address to collect mail. Purdy listed the same address on an employment application and it also appeared on a police arrest report for Purdy.